package com.reran.homework;


/**
 * @description:
 * @author: WangSiTeng
 * @date: 2021/11/27
 */
public class AsyncRun01 {


    public static void main(String[] args) throws Exception {
        long start=System.currentTimeMillis();

        SumThread sumThread = new SumThread();
        sumThread.start();
        sumThread.join();
        //这是得到的返回值
        int result = sumThread.getResult();
        // 确保  拿到result 并输出
        System.out.println("异步计算结果为："+result);
        System.out.println("使用时间："+ (System.currentTimeMillis()-start) + " ms");
    }

    private static int sum() {
        return fibo(36);
    }

    private static int fibo(int a) {
        if ( a < 2) {
            return 1;
        }
        return fibo(a-1) + fibo(a-2);
    }

    static class SumThread extends Thread {
        private Integer result;

        public Integer getResult() {
            return result;
        }
        @Override
        public void run() {
            result = sum();
        }

    }
}
